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SRC: Fix linear ma_resampler_get_expected_output_frame_count().

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This commit is contained in:
David Reid
2020-01-19 17:24:20 +10:00
parent 959885a303
commit f7ff9ee19e
2 changed files with 34 additions and 35 deletions
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research/ma_resampler.h
+29 -32
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@@ -59,9 +59,6 @@ typedef struct
struct
{
void* pSpeexResamplerState; /* SpeexResamplerState* */
ma_uint64 runningTimeIn;
ma_uint64 runningTimeOut;
double t; /* For tracking the input time so we can query required input and expected output frame counts. */
} speex;
} state;
} ma_resampler;
@@ -505,8 +502,7 @@ static ma_result ma_resampler_process__read__speex(ma_resampler* pResampler, con
ma_uint64 frameCountIn;
ma_uint64 framesProcessedOut;
ma_uint64 framesProcessedIn;
unsigned int framesPerIteration = 32768;
double ratioInOut;
unsigned int framesPerIteration = UINT_MAX;
MA_ASSERT(pResampler != NULL);
MA_ASSERT(pFramesOut != NULL);
@@ -524,8 +520,6 @@ static ma_result ma_resampler_process__read__speex(ma_resampler* pResampler, con
framesProcessedOut = 0;
framesProcessedIn = 0;
ratioInOut = (double)pResampler->config.sampleRateIn / (double)pResampler->config.sampleRateOut;
while (framesProcessedOut < frameCountOut && framesProcessedIn < frameCountIn) {
unsigned int frameCountInThisIteration;
unsigned int frameCountOutThisIteration;
@@ -561,14 +555,8 @@ static ma_result ma_resampler_process__read__speex(ma_resampler* pResampler, con
framesProcessedIn += frameCountInThisIteration;
framesProcessedOut += frameCountOutThisIteration;
pResampler->state.speex.t += frameCountOutThisIteration * ratioInOut;
//pResampler->state.speex.t = pResampler->state.speex.t - floor(pResampler->state.speex.t);
}
pResampler->state.speex.runningTimeOut += framesProcessedOut;
pResampler->state.speex.runningTimeIn += framesProcessedIn;
*pFrameCountOut = framesProcessedOut;
*pFrameCountIn = framesProcessedIn;
@@ -743,20 +731,11 @@ ma_uint64 ma_resampler_get_required_input_frame_count(ma_resampler* pResampler,
case ma_resample_algorithm_speex:
{
#if defined(MA_HAS_SPEEX_RESAMPLER)
#if 0
ma_uint64 count;
double t = pResampler->state.speex.t;
#if 0
count = (ma_uint64)floor(t + (outputFrameCount * ratioInOut) + 0.00000001);
#else
count = (ma_uint64)(floor(t + (outputFrameCount * ratioInOut)) - floor(t));
#endif
return count;
#endif
ma_uint32 count;
ma_speex_resampler_get_required_input_frame_count((SpeexResamplerState*)pResampler->state.speex.pSpeexResamplerState, (unsigned int)outputFrameCount, &count);
int speexErr = ma_speex_resampler_get_required_input_frame_count((SpeexResamplerState*)pResampler->state.speex.pSpeexResamplerState, outputFrameCount, &count);
if (speexErr != RESAMPLER_ERR_SUCCESS) {
return 0;
}
return count;
#else
@@ -790,16 +769,34 @@ ma_uint64 ma_resampler_get_expected_output_frame_count(ma_resampler* pResampler,
{
case ma_resample_algorithm_linear:
{
/*
The linear backend initializes t to -1 at start up to trigger the initial load of the first sample. In this case we will always load at
least two whole input frames before outputting the first output frame.
*/
ma_uint64 outputFrameCount = 0;
double t = pResampler->state.linear.t;
if (t < 0) {
t = 2;
t = 1;
inputFrameCount -= 1;
}
return (ma_uint64)ceil((t + inputFrameCount) / ratioInOut) - 1;
for (;;) {
if (t > 1) {
if (inputFrameCount > (ma_uint64)t) {
inputFrameCount -= (ma_uint64)t;
t -= (ma_uint64)t;
} else {
inputFrameCount = 0;
break;
}
}
t += ratioInOut;
outputFrameCount += 1;
if (inputFrameCount == 0) {
break;
}
}
return outputFrameCount;
}
case ma_resample_algorithm_speex: